Well-casing head



0. C. ZUCK AND L. 0. BACON.

WELL CASING HEAD. APPLICATION FILED JAN-7,1921- 1,4 14 -,320, Patented Apr. 25, 1922.

2 SHEETS-SHEET l.

gwvemtoz 0. c. ZUCK AND L. 0. BACON.

WELL CASING HEAD.

APPLICATION FILED JAN. 7. 1921.

Patented Apr. 25, 1922;

2 SHEETSSHEET 2.

UNITED STATES PATENT OFQFICE.

ORAL C. ZUCK AND LEE 0. BACON, OF OKMULGEE, OKLAHOMA.

WELL-CASING HEAD.

To all-whom it may concern:

Be it known that we, ORAL C. ZUCK and LEE 0. BACON, citizens of the United States, residingat Okmulgee, in the county of Okmulgee and State of Oklahoma, have invented certain new and useful Improvements in Well-Casing, Heads; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In the operation of oil, gas and similar deep wells it is desirable to provide for the ready, easy and positive control of the pressure and at the same time not to interfere with the free operation of the drilling and other tools. I

This invention provides a head ofnovel and peculiar structure adapted to be secured to the topof the casing and having an outlet for the escape of fluid pressure and provided with a gate controlled 0 ening through which the tools may be rea ily passed when let into the well or withdrawn therefrom, said gate being so mounted and having associated therewith operating means whereby it may be positively actuated with the greatest facility.

Other objects and advantages will be apparent ,and suggest themselves as the nature of the invention is understood.

While the drawings illustrate an embodiment of the invention, it is to be understood that in adapting the same to .meet different conditions and requirements, various changes in the form, proportion and minor details of construction may be resorted to without departing from the nature of the invention.

Referring to the drawings hereto attached.

Figure'l is a top plan view of the head,

Figure 2 is a view with the cover removed.

and the gate opened,

Figure 3 is a view similar to Figure 2, the gate being closed,

Figure 4 is a view of the head inverted, and

Figure 5 is a vertical longitudinal section on the line 55 of Figure 3, looking in the direction indicated by the arrow.

Corresponding and like arts are referred to in the following description and designated in the several views of the lrawings by like reference characters.

The head comprises an elongated hollow Specification of Letters Patent. Patented Apr. 25, 1922. Application filed January 7, 1921. Serial No. 435,639. A

body 1 provided at one end with a depending chambered extension 2 having an opening 3 in its bottom and an opening 1 in one side. The opening 3 is designed to receive the end of the wall casing to which the head is secured. The opening 4: is adapted to have a pipe coupled thereto for carrying off the fiuid pressure. An opening 5 is formed in the body about in. line with the opening 3 and is adapted to be closed by means of the gate. The drilling tools are adapted to be introduced through the opening 5. The top side of the body 1 is opened and adapted to be closed by means of a cover 6. The

outer sides of the body and cover "are strengthened by means of ribs. The cover 6 is removable and when in position is made secure by means of bolts or like fastenings 7. An opening 8 is formed in one end of the cover 6 in line with the chambered extension 2. A flange 9 surrounds the opening 8 and constitutes a boss and is provided with a plurality of screws 10 by means of which any part adapted to be coupled to the head may be secured. The gate 11 is slidably mounted within the body 1 and is retained in place by means of the cover 6. The under side of the gate 11 is recessed and one longi-v tudinal wall of the recess is rovided with rack teeth. The toothed wall of the recess is indicated at 12 and is "of cam or ogee formation. A gear wheel 13 disposed within the body 1 has its teeth in meshing relation with the teeth 12. A shaft 14 mounted in the bottom of the body 1 extends into the space thereof and has the gear wheel 13 secured to its upper end. The lower end of the shaft 14 projects below the bottom of the body 1 and terminates in a head 15 which is constructed to receivea suitable tool whereby the shaft may be rotated to effect movement of the gate 11. The gear wheel mounted so as to effect a variable movement of the gate both .in the opening and the closing'thereof. This also results in a variable leverage. The initial closing movement of the gate is relatively rapid and the final closing movement is slow, this being due to the gradually increasing leverage. The opening movement of the gate is the reverse, the initial movement being relatively slow and the final movement rapid. Rollers 16 journaled to an edge portion of the gate 11 sustain the side thrust and facilitate the opening and closing movement of the gate.

In the active operation of the head it is 13 is eccentrical'ly secured to the upper. end of the casing and a suitable discharge pipe is connected to the opening 4 of the chambered portion 2. Under normal conditions, the gate 11 is in open position so as not to obstruct the passage of the drilling and other tools through the openings in the head. When the well develops pressure and it is desirable to control the same, the tools are removed and the gate is closed. The construction is such as to admit of the gate 11 being closed against the pressure. When the gate is closed the pressure is delivered through the opening 4 and the discharge pipe connected therewith, as will be readily understood.

What is claimed is: 1. A head adapted to be applied to a well casing and provided with a gate controlled cally within the casing and coacting With the rack teeth and disposed within the recessed side of the gate.

3. A well casing head comprising an elongated hollow body provided at one end with a depending chambered portion having a pressure inlet and a pressure outlet, a cover for closing the open side of the hollow body there being openings in'the cover and body in line with the inlet pressure opening, a gate slidably mounted within the hollow body and provided in one side with a recess and having one wall of the recess of cam formation and provided with rack teeth, a gear wheel ecccentrically mounted within the body and cooperating with the rack, and a shaft mounted in the hollow body having the gear wheel fast thereto, the outer end of the1 shaft adapted to receive an operating too In testimony whereof we aflix our signatures in presence of two witnesses.

ORAL 'c. ZUCK. LEE 0. BACON.

Witnesses:

. WALTER B. MALLERNEE,

- H. D. Em). 

